qzdoom/src/rendering/r_videoscale.cpp

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//
//---------------------------------------------------------------------------
//
// Copyright(C) 2017 Magnus Norddahl
// Copyright(C) 2018 Rachael Alexanderson
// All rights reserved.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see http://www.gnu.org/licenses/
//
//--------------------------------------------------------------------------
//
#include <math.h>
#include "c_dispatch.h"
#include "c_cvars.h"
#include "v_video.h"
#include "templates.h"
#define NUMSCALEMODES 6
extern bool setsizeneeded;
EXTERN_CVAR(Int, vid_aspect)
CUSTOM_CVAR(Int, vid_scale_customwidth, VID_MIN_WIDTH, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
if (self < VID_MIN_WIDTH)
self = VID_MIN_WIDTH;
setsizeneeded = true;
}
CUSTOM_CVAR(Int, vid_scale_customheight, VID_MIN_HEIGHT, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
if (self < VID_MIN_HEIGHT)
self = VID_MIN_HEIGHT;
setsizeneeded = true;
}
CVAR(Bool, vid_scale_customlinear, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
CUSTOM_CVAR(Bool, vid_scale_customstretched, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
setsizeneeded = true;
}
namespace
{
struct v_ScaleTable
{
bool isValid;
bool isLinear;
uint32_t(*GetScaledWidth)(uint32_t Width);
uint32_t(*GetScaledHeight)(uint32_t Height);
bool isScaled43;
bool isCustom;
};
v_ScaleTable vScaleTable[NUMSCALEMODES] =
{
// isValid, isLinear, GetScaledWidth(), GetScaledHeight(), isScaled43, isCustom
{ true, false, [](uint32_t Width)->uint32_t { return Width; }, [](uint32_t Height)->uint32_t { return Height; }, false, false }, // 0 - Native
{ true, true, [](uint32_t Width)->uint32_t { return Width; }, [](uint32_t Height)->uint32_t { return Height; }, false, false }, // 1 - Native (Linear)
{ true, false, [](uint32_t Width)->uint32_t { return 640; }, [](uint32_t Height)->uint32_t { return 400; }, true, false }, // 2 - 640x400 (formerly 320x200)
{ true, true, [](uint32_t Width)->uint32_t { return 960; }, [](uint32_t Height)->uint32_t { return 600; }, true, false }, // 3 - 960x600 (formerly 640x400)
{ true, true, [](uint32_t Width)->uint32_t { return 1280; }, [](uint32_t Height)->uint32_t { return 800; }, true, false }, // 4 - 1280x800
{ true, true, [](uint32_t Width)->uint32_t { return vid_scale_customwidth; }, [](uint32_t Height)->uint32_t { return vid_scale_customheight; }, true, true }, // 5 - Custom
};
bool isOutOfBounds(int x)
{
return (x < 0 || x >= NUMSCALEMODES || vScaleTable[x].isValid == false);
}
}
void R_ShowCurrentScaling();
CUSTOM_CVAR(Float, vid_scalefactor, 1.0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
{
setsizeneeded = true;
if (self < 0.05 || self > 2.0)
self = 1.0;
if (self != 1.0)
R_ShowCurrentScaling();
}
CUSTOM_CVAR(Int, vid_scalemode, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
setsizeneeded = true;
if (isOutOfBounds(self))
self = 0;
}
CUSTOM_CVAR(Bool, vid_cropaspect, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
setsizeneeded = true;
}
bool ViewportLinearScale()
{
if (isOutOfBounds(vid_scalemode))
vid_scalemode = 0;
// hack - use custom scaling if in "custom" mode
if (vScaleTable[vid_scalemode].isCustom)
return vid_scale_customlinear;
// vid_scalefactor > 1 == forced linear scale
return (vid_scalefactor > 1.0) ? true : vScaleTable[vid_scalemode].isLinear;
}
int ViewportScaledWidth(int width, int height)
{
if (isOutOfBounds(vid_scalemode))
vid_scalemode = 0;
if (vid_cropaspect && height > 0)
width = ((float)width/height > ActiveRatio(width, height)) ? (int)(height * ActiveRatio(width, height)) : width;
return (int)MAX((int32_t)VID_MIN_WIDTH, (int32_t)(vid_scalefactor * vScaleTable[vid_scalemode].GetScaledWidth(width)));
}
int ViewportScaledHeight(int width, int height)
{
if (isOutOfBounds(vid_scalemode))
vid_scalemode = 0;
if (vid_cropaspect && height > 0)
height = ((float)width/height < ActiveRatio(width, height)) ? (int)(width / ActiveRatio(width, height)) : height;
return (int)MAX((int32_t)VID_MIN_HEIGHT, (int32_t)(vid_scalefactor * vScaleTable[vid_scalemode].GetScaledHeight(height)));
}
bool ViewportIsScaled43()
{
if (isOutOfBounds(vid_scalemode))
vid_scalemode = 0;
// hack - use custom scaling if in "custom" mode
if (vScaleTable[vid_scalemode].isCustom)
return vid_scale_customstretched;
return vScaleTable[vid_scalemode].isScaled43;
}
void R_ShowCurrentScaling()
{
int x1 = screen->GetClientWidth(), y1 = screen->GetClientHeight(), x2 = ViewportScaledWidth(x1, y1), y2 = ViewportScaledHeight(x1, y1);
Printf("Current vid_scalefactor: %f\n", (float)(vid_scalefactor));
Printf("Real resolution: %i x %i\nEmulated resolution: %i x %i\n", x1, y1, x2, y2);
}
CCMD (vid_showcurrentscaling)
{
R_ShowCurrentScaling();
}
CCMD (vid_scaletowidth)
{
if (argv.argc() > 1)
{
// the following enables the use of ViewportScaledWidth to get the proper dimensions in custom scale modes
vid_scalefactor = 1;
vid_scalefactor = (float)((double)atof(argv[1]) / ViewportScaledWidth(screen->GetClientWidth(), screen->GetClientHeight()));
}
}
CCMD (vid_scaletoheight)
{
if (argv.argc() > 1)
{
vid_scalefactor = 1;
vid_scalefactor = (float)((double)atof(argv[1]) / ViewportScaledHeight(screen->GetClientWidth(), screen->GetClientHeight()));
}
}
inline bool atob(char* I)
{
if (stricmp (I, "true") == 0 || stricmp (I, "1") == 0)
return true;
return false;
}
CCMD (vid_setscale)
{
if (argv.argc() > 2)
{
vid_scale_customwidth = atoi(argv[1]);
vid_scale_customheight = atoi(argv[2]);
if (argv.argc() > 3)
{
vid_scale_customlinear = atob(argv[3]);
if (argv.argc() > 4)
{
vid_scale_customstretched = atob(argv[4]);
}
}
vid_scalemode = 5;
vid_scalefactor = 1.0;
}
else
{
Printf("Usage: vid_setscale <x> <y> [bool linear] [bool long-pixel-shape]\nThis command will create a custom viewport scaling mode.\n");
}
}